Pipe-valve.



WILLIAM VESTAL, or rmmristn, running.

PIPE-VALVE.

Specification of Letters Patent.

atented Feb. 8t 9?- Appllcation filed April 27, 1906, Serial No. 314,067.

To all whom it may concern:

Be it known that I, WILLIAM B. VESTAL, a citizen of the United States, residing at Plainfield, in the county of Hendricks and State of Indiana, have invented certain new and useful Improvements in Pipe-Valves. of which the following is a specification.

This invention relates to improvements in valves for all general purposes and particularly for high pressure pipes, and the object of the invention is to provide a. simple and durable device which will insure a complete cutoff.

I accmnplish the objects of the invention by the mechanism illustrated in the accompanying drawing which represents a vertical section of a valve containing my improvements taken on a plane extending longitudinally ol the pipes connected with said valve.

ltel'erring to the drawing, 1 represents the body of mu improved valve having the partition Formed through this partition is an opening surrounded by the tubular Wall 1%; The walls 3 are tapering on their outer faces to form a truncated conical extension which is screw threaded in the manner shown in the drawing. The body 1 has a valve-stein opening which is surrounded by the externally scrcw-tl1readed cylindrical walls 4 with an inside bevel 2, and 5 is a cap with a slightly beveled inner end 3, which is seated in the beveled opening at the upper end of the Walls 4.

6 is an internall' screw-threaded con )ling ring which screws upon the threads ol the walls 4 and draws the cap 5 firmly into its seat in the end of the valve-stem opening.

7 is the valves-tent having the screw threads 8 which engage corresponding screwthrcads on the interior bore of the cap 5. The stem 7 has the usual hand wheel 9 for rotating the stem and the escape of steam or gases around the stem at the outer bore of the cap is prevented by the usual packing 10 which is t rawn tight b the usual stufling ring 1 1. The inner on of the stem 7 is en larged and is provided with an internally screw-threaded tapering socket which is screwed upon the threaded walls surrounding; the valve wall 3.

13 is a packing ring of copper or other material softer than the metal of the valve-seat, which ring is held in place by the plate 14: The plate 14 is retained in position against the ring 13 by the screw 15. The lower end of the socket 12 has its bearing against the packing-ring 16 located upon a suitable shoulder at the base of the truncated. conical Walls surrounding the valve opening. The ring 6 enables the cap 5 to be turned into such a position as will erniit the threads in the socket 12 to take 101d properly of the threads on the Walls surrounding the valve seat, and the required adjustment will be retained b tightening the ring 6 upon the walls 1 in the manner as will be readily under stood from the drawing. The rotation of the valve stem 7 causes a Wearing friction on the softer packing 13 which I relieve by a thin washer 19 between these parts, The material of this washer will be brass or harder metal than the acking 13.

Havin thus 'ully described my invention, what I c aim as new and wish to secure by Letters Patent of the United States, is-

1. A valve having a valve-seat with an externally screw-threaded wall, a valve-stem having a screw-threaded body and a screwthrcoded socket to screw upon and envelop the threaded wall of the valve-seat said valve-seat forming a bearin against the inner end of the socket, and the wall of said socket forming a bearing against the base of the valve-scat, and a removable packing between each of said bearings, an opening through the wall ofthe valve for the admission of the socket said 0 enin havin an externally screwdhreade wali with evcled inner edge, a cap with beveled inner end, an internally threaded couplin ring screwing upon the last wall to attach the cap, said cap having internal screw-threads to engage those of the stem, and a stutling ring and packing to pack the joints between the stem and cap.

2. A valve having a valve-scat with an ex tcrnally screw-threaded wall, a valve-stcm havin a screw-threaded body and a screwthreatled socket to envelop the threaded wall of the valve-seat, a removable packing of softer material than the stem and seat at the inner end of the socket, and a washer of a harder material than the packing interposed between the socket and packing, an opening throu h the wall of the valve for the admission 0 the socket said 0 enin liavin an externally screw-threadet wall with lieveled inner edge, a cap with beveled inner end, an

internally thrddd coup -ring screwing my hand and seal at Indianapolis, Indiana, upon the last wall toat tach t ca ,said cap this, ninth day of April, A. D. we thousand having internal screw-threads engage nine hundred and six. than 0! the Item, and a stufiing ring and WILLIAM B VESTAL. [,L. s4} 5 to pack the joints between the stem Witnesses:

and ca.p J, A. MINTURN,

In mtn'els whereof, I, have hereunto set F. W. Wonmmn. 

